SOLUTION: use descartes rule of signs to determine the possible number of positive and negative zeros for the function P(x)= -3x^5 - 7x^3

SOLUTION: use descartes rule of signs to determine the possible number of positive and negative zeros for the function P(x)= -3x^5 - 7x^3 - 4x-5

Question 151042: use descartes rule of signs to determine the possible number of positive and negative zeros for the function P(x)= -3x^5 - 7x^3 - 4x-5
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
To use Descartes rules of signs, look at P(x) and P(-x)

Since there are no sign changes in the coefficients from + to - or vice versa, then there are no positive roots.

There is one sign change from + to -, there is exactly one negative root.

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